Some one asked how the serpent and sea-crane pearls could be told apart, and the wise man answered: "The animals themselves recognize them." Then the emperor selected a serpent-pearl and a sea-crane pearl, put them together with a whole bushel of ordinary pearls, and poured the lot out in the courtyard. Then a large yellow serpent and a black crane were fetched and placed among the pearls.
At once the crane took up a sea-crane pearl in his bill and began to dance and sing and flutter around. But the serpent snatched at the serpent-pearl, and wound himself about it in many coils. And when the people saw this they acknowledged the truth of the wise man's words. As regards the radiance of the larger and smaller pearls it turned out, too, just as the wise man had said.